As testified to already, it works great. Just make sure your windshield is clean before applying. If you can find Bon Ami - it's a cleanser like Ajax or Comet, at the store, that works best. It's a little less agressive than the rest, and will work well on your windshield.

Works great! Good tip about the Bonami Randy! It will not scratch yur windshield. I dont know if the others will or not. Not worth the chance tho. The wiperblade manufactures use Bonami to clean winshields prior to wiperblade tests. As a matter of fact.. I think Bonamis' tag line is something like... "never scratched yet" or something like that. Clean the windshield good, apply the Rain X as per the instructions and I'll bet you'll be amazed.

Six turnin', two burnin' and four prayin'!
John Deere Certified Master Technician.

you can get rainx in a windshield wash. press the button and voila clean and rainx all at once. It doesent freeze in the bottle so I use it when plowing. It does help melted snow to bead and runoff the windshield.